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Memory Beta, non-canon Star Trek Wiki

"Return to Tomorrow" was the 51st episode of Star Trek: The Original Series.



Episode characters

Clifford Brent[1]Christine ChapelPavel ChekovBill HadleyHenochJames T. KirkRoger LemliRyan LeslieLeonard McCoyAnn MulhallZainab OdhiamboSargonMontgomery ScottSpockHikaru SuluThalassaNyota Uhuraunnamed USS Enterprise (NCC-1701) personnel
Referenced only
Adam and Eve

Novelization characters

Christine ChapelHanochJames T. KirkLeonard McCoyM'BengaAnne MulhallSargonMontgomery ScottSpockHikaru SuluThalassaNyota Uhura

Starships and vehicles

USS Enterprise (Constitution-class heavy cruiser)
Referenced only
Apollo 11


Arret (Arret system, the galaxy's Alpha or Beta Quadrants)
Referenced only
Alpha CentauriEarthMars

Races and cultures


Materials and substances


Foods and beverages


Drugs and treatments

metabolic reduction injection

Science and medicine


Measurement and classification

body temperatureccclass M planetFahrenheitheart ratemetabolic ratemilestandard orbit


arteryheartlungmusclevital organ

Technology and weapons

androiddistress signal relayhumanoid robothypomicro-gearnegatron hydrocoilpulleyreceptaclescalpelstarshipsubspace radiotransportertricorder

Communications and tactics

diagramsubspace radio

States and organizations


Ranks and titles

captainchief engineerchief medical officercommanderconndoctorengineerensignfirst officerhelmsmanlieutenantlieutenant commandermedicine mannavigatorphysicianscience officersecond officertactical officertechnicianweapons officer

Other references

BonesclothingcommunicationenergyeuphoriaevolutiongalaxygovernmenthumanoidKirk in deathKirk's womenlanding partylifeformmattermeasurementmedicinememorynation-statenuclear age/nuclear eraplanetpoisonsciencespacetechnologytimeuniformuniverseweapon


Vulcan prehistory
Mentioned by Spock.
stardate 4768.3, 2268 (2260s chronology, 2264–2270 Enterprise voyages)
Enterprise travels to Arret.


Related media





published order
Previous episode:
By Any Other Name
TOS episode produced Next episode:
Patterns of Force
Previous episode:
A Private Little War
TOS episode aired Next episode:
Patterns of Force
Previous story:
first story
Star Trek 9
Next story:
The Ultimate Computer
chronological order
Previous Adventure:
First, Do No Harm
Memory Beta Chronology Next Adventure:
The Order of Things
Pages 15-19
Previous Adventure:
Mutiny on the Enterprise
Pocket Next Adventure:
Patterns of Force
Previous Adventure:
Mutiny on the Enterprise
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
Patterns of Force

External link

  1. This character was not named in the episode but the same actor, wearing an officer's Starfleet uniform, was addressed as Brent in TOS episode: "The Naked Time". The same actor also played the character of Vinci.